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Titolo:
DIELECTRIC BEHAVIOR OF OCTYL BETA-D-GLUCOPYRANOSIDE MICELLES IN WATERAND IN WATER-GLYCINE SOLUTIONS
Autore:
BONINCONTRO A; BRIGANTI G; DAPRANO A; LAMESA C; SESTA B;
Indirizzi:
UNIV ROMA LA SAPIENZA,DEPT PHYS,INFM,PLE A MORO 5 I-00185 ROME ITALY UNIV ROMA LA SAPIENZA,DEPT CHEM I-00185 ROME ITALY
Titolo Testata:
Langmuir
fascicolo: 13, volume: 12, anno: 1996,
pagine: 3206 - 3210
SICI:
0743-7463(1996)12:13<3206:DBOOBM>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONIONIC SURFACTANTS; MICELLIZATION; PROTEINS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
30
Recensione:
Indirizzi per estratti:
Citazione:
A. Bonincontro et al., "DIELECTRIC BEHAVIOR OF OCTYL BETA-D-GLUCOPYRANOSIDE MICELLES IN WATERAND IN WATER-GLYCINE SOLUTIONS", Langmuir, 12(13), 1996, pp. 3206-3210

Abstract

The dielectric permittivity, viscosity, and density of octyl beta-D-glucopyranoside (OBG)and glycine (G) aqueous solutions, with different OBG/G molecular ratios, were measured as a function of surfactant concentration and temperature in order to investigate the effect of the amino acid on the surface of glucoside micelles. The amino acid shows anappreciable influence on the thermodynamic stability of the surfactant aggregates. However viscometric, volumetric, and dielectric results indicate that glycine is not involved in the micellar surface. Such a result indicates that the stabilization of the OB;G micellar assemblies, previously observed, is mainly due to the reduction of the solubility of the hydrocarbon tail and/or to an increase of the interfacial tension between the micellar oil core and the solvent rather than to short-range interactions between glycine and OBG polar head groups.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 14:32:01